Find the product of $0.9$ and $12.3$, and round the answer to one decimal place.

Step-by-step solution

1. Multiply the numbers treating them as whole numbers: $9\times 123=1107$.
2. Count the decimal places: $0.9$ has 1 decimal place and $12.3$ has 1 decimal place, total 2 decimal places.
3. Place the decimal point two places from the right in $1107$ to get $11.07$.
4. Round $11.07$ to one decimal place: the second decimal digit is $7$ which is $ge5$, so increase the first decimal digit by 1.
5. Result: $11.1$.

Concept tested: Decimal multiplication and rounding

Published 10 October 2026 · How this solution was prepared and checked