Xiao Ming’s electricity bill for the first four months of this year is 300 yuan. According to this calculation, how much is the electricity bill for a year?
小明家今年前4个月的电费300元，照这样计算，一年的电费是多少元？
<gadget id="calculator">300 / 4</gadget>
<output>75</output>

<gadget id="calculator">75 * 12</gadget>
<output>900</output>

<result>900</result>