What numbers do the words represent Love math × learn I love learning Please explain in detail the reasons why I, love, number, learning and so on

What numbers do the words represent Love math × learn I love learning Please explain in detail the reasons why I, love, number, learning and so on

Learning can be 1, 5, 6
∵ love ≠ me
Learning ≠ 1
∵ learning ≥ 5
Love = 1
When learning = 5
Love = 2 or 7
Learning = 6
Multiple = 3 × 10
Number = 8 or 3
8 give up
I = 8
Love = 1
Number = 3
Learning = 6

A cuboid steel is 3 meters long, with a cross-sectional area of 25 square centimeters. Each cubic decimeter of steel weighs 8 kg. How much is this steel? (note the unit)

3 meters = 30 decimeters
25 square centimeter = 0.25 square decimeter
8×（0.25×30）
=8×7.5
=60kg

A rectangular steel plate weighs 128.7 kg, 2.2 meters long and 1.5 meters wide. Each cubic decimeter of steel weighs 7.8 kg. How many decimeters thick is the steel?

Bottom area: 2.2 × 1.5 = 3.3 square meters = 330 square decimeters
Thickness: 128.7 ﹣ 7.8 ﹣ 330 = 0.05 decimeter

A piece of steel is 1.2m long, 4cm wide and 1cm thick. Each cubic decimeter of steel weighs 7.8kg. How many kg does this piece of steel weigh?
One more! Thank you
A square billet with an edge length of 0.6 meters is forged into a rectangular steel with a cross-sectional area of 0.12 square meters. How long is the steel? (solved by equation)

I don't know, but I know
A square billet with an edge length of 0.6 meters is forged into a rectangular steel with a cross-sectional area of 0.12 square meters. How long is the steel? (solved by equation)
0.6³=0.216（m³）
Suppose this steel has x meters
0.12x=0.216
x=0.216÷0.12
X=1.8
A: 1.8 meters long

A cuboid steel is 12 meters long with a cross-sectional area of 0.07 square meters. If a cubic decimeter steel weighs 7.8 kg, how many kg does it weigh?

From ρ = m / V
And V = sh = =0.84 m^3
ρ=7.8kg/dm^3=7.8×10^3 kg/m^3
So m = ρ v = =6552 kg
For reference only!

A cuboid steel is 1.5 meters long, with a cross-sectional area of 2.4 square decimeters. Each cubic decimeter of steel weighs 7.8 kg

1.5m = 15m
The weight of the steel
=(2.4×15)×7.8
=36×7.8
=280.8 (kg)

There is a cuboid steel, 2 meters long, with a cross-sectional area of 0.05 square meters. If each cubic decimeter weighs 7.8 kg, how many kg does the cuboid steel weigh
Notice that the cubic decimeter is 7.8 kg

Weight 2x0.05x1000x7.8 = 780kg
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After a 3-meter-long cylindrical steel is cut into two equal sections, the surface area increases by 0.6 square decimeter. If each cubic decimeter weighs 7.8 kg, how many kg does the steel weigh/

The bottom area is 0.6 △ 2 = 0.3 square decimeter
The mass is 7.8 × 0.3x30 = 70.2kg

A square steel, the bottom area is 36 square decimeters, if each cubic decimeter of steel weight 7.8 kg, how much steel weight

36 △ 6 = 6 (decimeter) 6 × 6 × 6 = 216 (cubic decimeter) 216 × 7.8 = 1684.8 (kg) a:

Given a = radical 3-1, find the value of a cube + 2A cube-a

Given a = root 3-1, find the value of cube a + 2A square-a
A cube + 2A square - A
=a³+2a²+a-2a
=a(a²+2a+1)-2a
=a(a+1)²-2a
=(√3-1)(√3-1+1)²-2(√3-1)
=3√3-3-2√3+2
=√3-1