The price of a box of milk is 42.5 yuan, and the price of a box of biscuits is 15.8 yuan. Mom took 100 yuan to buy these two items, how much money is left?
一箱牛奶的价格是42.5元，一盒饼干15.8元．妈妈带100元去买这两件物品，还剩多少元钱？
<gadget id="calculator">100 - 42.5 - 15.8</gadget>
<output>41.7</output>

<result>41.7</result>