Xiao Wang's weight is 40 kg, which is 4/5 of Zhuang Zhuang's weight. How many kilograms does Zhuang Zhuang weigh?
小王的体重是40千克，是壮壮体重的(4/5)，壮壮重多少千克．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">40 / (4/5)</gadget>
<output>50</output>

<result>50</result>