Fractions and Decimals — MATHS STD 7 — Question

In order to find the product, we first multiply $22$ by $2$
We have, $22 \times 2 = 44$
Now, $2.2$ has $1$ decimal place, $0.2$ has $1$ decimal place and $0.001$ has $3$ decimal places.
The sum of the decimal places is $1 + 1 + 3 = 5$
So, the product must contain 5 places of decimals.
$\therefore 2.2 \times 0.2 \times 0.001 = 0.00044$
Thus, the value of $2.2 \times 0.2 \times 0.001 is 0.00044$