It is known that a 60-watt lamp consumes (3/5) kWh per hour. There is a 50-watt lamp in a reception room, and there are no other electrical appliances. The power consumption of the reception room in December is 60 How many hours have you used the light in the reception room?
已知一盏60瓦的灯，每小时耗电(3/5)度，某传达室有一盏50瓦的灯，除此之外没有别的电器，12月份该传达室的用电量是60度，那么传达室的这盏灯共使用多少小时？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) / 60</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">(1/100) * 50</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">60 / (1/2)</gadget>
<output>120</output>

<result>120</result>