There is a batch of steel in a warehouse. The original plan is to use 12 tons per day. Due to the improvement of technology, the actual daily use is 3 tons more than the original plan, which is 8 days less than the original plan. How many tons are there in this batch of steel?
某库房有一批钢材，原计划每天用12吨，由于提高技术，实际每天比原计划多用3吨，这样比原计划少用8天，这批钢材有多少吨？
<gadget id="calculator">8 / 3</gadget>
<output>8/3 = around 2.666667</output>

<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<gadget id="calculator">12 * (8/3) * 15</gadget>
<output>480</output>

<result>480</result>