A factory consumes (9/4) tons of coal in (10/3) hours, how many tons of coal is used on average per hour? What is the correct column
一座工厂(10/3)小时用掉了(9/4)吨煤，平均每小时用煤多少吨？列式正确的是多少
<gadget id="calculator">9 / 4</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">10 / 3</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">(9/4) / (10/3)</gadget>
<output>27/40 = around 0.675</output>

<result>27/40 = around 0.675</result>