A batch of coal is originally planned to burn 0.05 tons per day, and it will be burnt out in 60 days. The actual saving is 0.01 tons per day. How many days did it actually burn?
一批煤，原计划每天烧0.05吨，60天烧完，实际每天节约0.01吨，实际烧了多少天？
<gadget id="calculator">0.05 - 0.01</gadget>
<output>0.04</output>

<gadget id="calculator">60 / 0.04</gadget>
<output>1_500</output>

<gadget id="calculator">0.05 * 1_500</gadget>
<output>75</output>

<result>75</result>