The distance from Xiaohaijia to Xinhua Bookstore is 24 kilometers. Xiao Hai rode his bicycle to the bookstore from 7:00 in the morning, stayed in the bookstore for an hour, and then rode his bicycle back. It was already 12:00 noon when he got home. May I ask how many meters does Xiaohai travel per hour?
小海家到新华书店有24千米的距离．小海从早晨7时起骑着自行车往书店驶去，在书店逗留了1个小时后又骑着自行车往回赶，到家时已经是中午12时了．请问小海每小时行驶多少米？
<gadget id="calculator">12 - 7 - 1</gadget>
<output>4</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">24 * (1/2) * 1_000</gadget>
<output>12_000</output>

<result>12_000</result>