There are 30 basketballs in the sports room. The number of basketballs is 3/5 of that of volleyballs. How many volleyballs are there? (solution by equation)
体育室有篮球30个，篮球的个数是排球的(3/5)，排球有多少个？(用方程解)
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 / (3/5)</gadget>
<output>50</output>

<result>50</result>