Xiaohua and Xiaoying set off from their home 720 meters apart at the same time and walk toward each other. Xiaohua walks 40 meters per minute, and Xiaoying walks 50 meters per minute. How many minutes later do they meet?
小华和小英同时从相距720米的家中出发，相向而行，小华每分走40米，小英每分走50米，几分后两人相遇？
<gadget id="calculator">40 + 50</gadget>
<output>90</output>

<gadget id="calculator">720 / 90</gadget>
<output>8</output>

<result>8</result>