$($Hints: $10$ is an integer number. Integer numbers are exact, number. Computers approximate real numbers using floating figures or digits. LON$-$CAPA typically expects $3,4$ or $5$ digits. numbers are expressed in scientific or exponential notation li computer software $-$ like LON$-$CAPA $-$ as $1\mathrm{.}23$E$15$ or $1\mathrm{.}23e15$ the number and the exponent are negative, then you type $-1$ but $\text{'}$E$\text{'}$ or 'EEX' or 'Exp' are also possible.$)$