Xiao Ding Ding and Xiao Pang set off at the same point on a 150-meter-long circular runway at the same time. Xiao Ding Ding ran an average of 4.5 meters per second. After 5 minutes, Xiao Ding Ding caught up with Xiao Pang. Ask: How many meters per second does Xiao Pang run on average? ?
小丁丁和小胖在一个长150米的环形跑道的同一地点同时同向出发，小丁丁平均每秒跑4.5米，经过5分钟小丁丁追上小胖，问：小胖平均每秒跑多少米？
<gadget id="calculator">5 * 60</gadget>
<output>300</output>

<gadget id="calculator">150 / 300</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4.5 - (1/2)</gadget>
<output>4</output>

<result>4</result>