12 boxes of bees can produce 900 kg of honey a year. Kobayashi's family has 7 boxes of bees. How many kilograms of honey can they produce in a year?
12箱蜜蜂一年可以酿900千克蜂蜜．小林家养了7箱蜜蜂，一年大约可以酿多少千克蜂蜜？
<gadget id="calculator">900 / 12</gadget>
<output>75</output>

<gadget id="calculator">75 * 7</gadget>
<output>525</output>

<result>525</result>