The price of electricity used by residents in a certain city is 0.52 yuan per kilowatt-hour. Fangfang’s family paid 18.72 yuan for electricity last month. How many kilowatt-hours did they use? (solution by equation)
某市居民用电的价格为每千瓦时0.52元，芳芳家上个月付电费18.72元，用电多少千瓦时？(用方程解)
<gadget id="calculator">18.72 / 0.52</gadget>
<output>36</output>

<result>36</result>