Xiaoyun and her 4 good friends folded paper planes together, and each folded 20 planes. How many planes did they fold in total?
小云和她的4个好朋友一起折纸飞机，每人折20架，他们一共折了多少架．
<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<result>100</result>