Decimal point in product is the sum of the decimal points in the numbers which we are multiplying.
For ex :
2.6 × 6.7 = 17.42
1 + 1 = 2
For, 1.7 × 2.5 the sum of decimal in each number is 1 and 1 .
So, decimal in product is at 2 i.e 4.25 .
For, 3.62 × 1.7 the sum of decimal in each number is 2 and 1.
Decimal in product is at 2 + 1 = 3 i.e 6.154 .
Therefore, solution is 1.7 × 2.5 = 4.25 and 3.62 × 1.7 = 6.154 .
Hence, this is the required solution.