Question

Laika wants to beat her friend Jessie in a running competition. So, Laika plans to run daily in the early morning. If Laika burns $503$ calories per day while running in the morning, then calculate how many calories would be burnt by Laika in $2,190$ days?

• A. $1,101,570$ calories
• B. $1,570,101$ calories
• C. $1,570,110$ calories

Answer 1

The correct option is A $1,101,570$ calories

Calories burnt by Laika in $1$ day $=503$ calories

Calories burnt by Laika in $2,190$ days $=2,190\times 503$ calories

$2,190\times 503$ can be evaluated as:

First, we would multiply the units digit of $503$, i.e., $3$ with $2,190$.


Now, we would multiply the tens digit of $503$, i.e., $0$ with $2,190$.


Now, we would multiply the hundreds digit of $503$, i.e., $5$ with $2,190$.

Finally, we would add $6570$, $00000$ and $1095000$ to get the answer.





Calories burnt by Laika in $2,190$ days would be $1,101,570$ calories.