The chemical fertilizer factory produced 300 tons of chemical fertilizers in September, 60 tons more than planned. How much was the overproduction in September?
化肥厂9月份生产化肥300吨，超过计划60吨，9月份超产多少
<gadget id="calculator">300 - 60</gadget>
<output>240</output>

<gadget id="calculator">60 / 240</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>