A batch of coal is shipped in three days, 25% of the first day is shipped, and 12 tons more are shipped on the second day than on the first day. The ratio of the tons shipped on the second day to the tons shipped on the third day is 3: 2. How many tons of this batch of coal are there?
一批煤三天运完，第一天运走25%，第二天比第一天多运了12吨，第二天运走的吨数与第三天运的吨数的比是3：2，这批煤共有多少吨？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">20 / (1/3)</gadget>
<output>60</output>

<result>60</result>