(3/5) of a number is 9, what is this number? (solution with equations)
一个数的(3/5)是9，这个数是多少？(用方程列式解)
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">9 * (5/3)</gadget>
<output>15</output>

<result>15</result>