The price of electricity for residents in a city is 0.5 yuan per kWh. Xiaoming’s family paid 42 yuan for electricity last month. How many kWh is Xiaoming’s household electricity?
某市居民用电的价格为每千瓦时0.5元．小明家上个月付电费42元，小明家用电多少千瓦时？
<gadget id="calculator">42 / 0.5</gadget>
<output>84</output>

<result>84</result>