Since
[tex]\begin{gathered} 1\text{ / }\frac{1}{10}=10\text{ and} \\ 4\text{ / }\frac{1}{10}\text{ = 40} \end{gathered}[/tex]The pattern is that once a number is divided by 1/10. It is equivalent to multiplying the number by 10.
Thus we find that;
[tex]18\text{ / }\frac{1}{10}\text{ = 18}\times10\text{ = 180}[/tex]Thus 18 / (1/10) = 180
