How to calculate 125 × 5 × 32 × 5

How to calculate 125 × 5 × 32 × 5

(125 times 8) times 4 times 5 times 5 equals 1000 times 100

296 + 73 + 104 + 37 1600 ﹣ 25 ﹣ 4 125 × 54-46 × 125 50.34 + 11.645-42.34 125 × 25 × 32 99 + 99 × 99

（1）296+73+104+37，=（296+104）+（73+37），=400+110，=510；（2）1600÷25÷4，=1600÷（25×4），=1600÷100，=16；（3）125×54-46×125，=125×（54-46），=125×8，=1000；（4）50.34+11.645-42.34，=50.34-...

How to divide 7x (- 9) by 7x (- 9)
I want the process. The standard answer is 81

7×(-9)÷7×(-9)
=(7÷7)×(-9)×(-9)
=1×(-9)×(-9)
=(-9)×(-9)
=81
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A negative number multiplied by a negative number equals a positive number