Mr. Zhang’s family spent 14 yuan more on water and electricity last month than this month. This month’s water and electricity bills are less than last month’s (2/15). How much was the water and electricity bill last month?
张老师家上月用去的水电费比本月多14元，本月的水电费比上月节约(2/15)，上月用去水电费多少元．
<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">14 / (2/15)</gadget>
<output>105</output>

<result>105</result>