When transporting a batch of apples, the ratio of the tonnage to the total tonnage on the first day is 1:4, and 3 tons are transported on the second day, which is exactly (1/3) of the total number of apples transported in two days. This batch of apples How many tons?
运送一批苹果，第一天运走的吨数与总吨数的比是1：4，第二天运走了3吨，两天正好运走了总数的(1/3)，这批苹果有多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) - (1/4)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">3 / (1/12)</gadget>
<output>36</output>

<result>36</result>