Question

Multiply - $1.6\times 4.009$

Answer 1

Multiplying decimal numbers-

Ignore the decimal point and multiply

$16\times 4009=64144$

Count the number of digits after the decimal point in both the numbers, we have $1$digit after the decimal in $1.6$ and $3$ digits in $4.009$.

So, place the decimal after four digits from the right in the product. $\left[\because 1+3=4\right]$

$1.6\times 4.009=6.4144$

Hence, the product of $1.6\times 4.009$ is $6.4144$.