There is a batch of cement at a construction site. If 140 tons of cement are transported in 4 hours in the morning, 28 tons per hour in 3 hours in the afternoon. How many tons of cement are transported per hour on this day?
某工地有一批水泥，如果上午4小时共运走140吨，下午3小时每小时运走28吨．这一天平均每小时运水泥多少吨？
<gadget id="calculator">28 * 3</gadget>
<output>84</output>

<gadget id="calculator">84 + 140</gadget>
<output>224</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">224 / 7</gadget>
<output>32</output>

<result>32</result>