A bag of coffee is 400 grams in total, and each cup needs 20 grams of coffee and 5 grams of cube sugar. How many grams of cube sugar is needed to finish this bag of coffee.
一袋咖啡共400克，每冲一杯需耍20克咖啡和5克方糖，冲完这一袋咖啡，需要多少克方糖．
<gadget id="calculator">400 / 20</gadget>
<output>20</output>

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

<result>100</result>