How to simplify the calculation of 25 ÷ (7 / 5 + 8 / 5)?

How to simplify the calculation of 25 ÷ (7 / 5 + 8 / 5)?

25/(15/5)
25/3

How to calculate 0.8 * 72.4 * 12.5

How to calculate 0.8 * 72.4 * 12.5
= 0.8 x 12.5 x 72.4
= 10 x 72.4
= 724
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