A number multiplied by 3, plus 27, and then divided by 7, minus 5, and finally divided by 4 to get 1. What's the number? Formula

A number multiplied by 3, plus 27, and then divided by 7, minus 5, and finally divided by 4 to get 1. What's the number? Formula

[(1×4+5)×7-27]÷3
=(9×7-27)÷3
=36÷3
=12
A: the number is 12
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How to convert the waist circumference of pants (for example, my pants are 165 / 70A, so how many centimeters is it? Is there a formula

One is the height waist centimeter method, such as 165 / 68A, which means that it is for people who are 165 high and 68 cm in waist. 68 cm is 2 feet. According to my experience, ordinary cotton pants and formal pants are knitted in this way. That a means the general method, sometimes 165 / 70B, which is short and fat. It's very rare. One is the hip circumference method, such as

In a division formula with remainder, the quotient of the divisor divided by the divisor is 5, and the remainder is also 5. The sum of the divisor, divisor, quotient and remainder is 165
What are the divisor and the divisor? Can you list the formula,

Divisor = divisor × quotient + sum of remainder, 165 contains two remainder, one is the directly added remainder, the other is the remainder contained in the divisor, 165-5-5 = 155, 155 contains divisor, quotient, and the rest after the divisor subtracts the remainder, that is, the product of divisor × quotient, 155-5 = 150, 150, including divisor