The chemical plant uses 1.3 tons of coal per day, which is 0.1 tons more than the plan. So how many days can the coal originally planned to be used for 65 days actually be used?
化工厂每天用煤1.3吨，比计划每天多用0.1吨，那么原计划65天用的煤，实际能用多少天？
<gadget id="calculator">1.3 - 0.1</gadget>
<output>1.2</output>

<gadget id="calculator">65 / 1.3</gadget>
<output>50</output>

<gadget id="calculator">1.2 * 50</gadget>
<output>60</output>

<result>60</result>