A box of bees can produce 300 kilograms of honey a year. Kobayashi's family has 12 boxes of such bees, how many kilograms of honey can be produced in a year?
一箱蜜蜂一年可以酿300千克蜂蜜．小林家养了这样的蜜蜂12箱，一年可以酿多少千克蜂蜜？
<gadget id="calculator">300 * 12</gadget>
<output>3_600</output>

<result>3_600</result>