On May 1st, Lan Lan and Fang Fang went to the street to play. Fang Fang spent 50 yuan to buy books, which was the money she brought (1/4), and the money Lan Lan brought was Fang Fang (4/5 ), Lan Lan took the money to the street.
五一那天，兰兰和芳芳去街上玩，芳芳买图书用去50元钱，是她所带的钱的(1/4)，兰兰带的钱是芳芳的(4/5)，兰兰带了多少钱上街．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">50 / (1/4)</gadget>
<output>200</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">200 * (4/5)</gadget>
<output>160</output>

<result>160</result>