box of biscuits weighs 62.5 grams. After eating half of the box, the weight of the box is 32.4 grams. How many grams does the biscuit weigh?
一盒饼干连盒重62.5克，吃去一半后，连盒重32.4克，饼干重多少克？
<gadget id="calculator">62.5 - 32.4</gadget>
<output>30.1</output>

<gadget id="calculator">30.1 * 2</gadget>
<output>60.2</output>

<result>60.2</result>