The distance between the two places is 0.9 kilometers. Xiaohua and Xiaohong set off from the two places at the same time and walk toward each other. One minute after Xiaohua set off, he returned to the original place to pick up things (the stay time is not counted), then returned immediately, and met Xiaohong after another 6 minutes. It is known that Xiaohong travels 60 meters per minute, so how many meters does Xiaohua travel per minute?
两地相距0.9千米，小华和小红从两地同时出发，相向而行．小华出发l分钟后，又回原地取东西(停留时间不计)，然后立即返回，又经过6分钟和小红相遇．已知小红每分钟行60米，那么小华每分钟行多少米．
<gadget id="calculator">0.9 * 1_000</gadget>
<output>900</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<gadget id="calculator">60 * 7</gadget>
<output>420</output>

<gadget id="calculator">900 - 420</gadget>
<output>480</output>

<gadget id="calculator">480 / 6</gadget>
<output>80</output>

<result>80</result>