On a map, the distance between A and B is 20cm. Two trains depart from A and B at the same time. A train travels 55km per hour, and B’s speed is that of A’s (9/11). How many hours later will the two cars meet? (Scale 1: 4000000)
在一幅地图上量得甲、乙两地是20cm，两列火车同时从甲、乙两地相对开出，甲车每小时行55km，乙车的速度是甲车的(9/11)，几小时后两车相遇？(比例尺1：4000000)
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">9 / 11</gadget>
<output>9/11 = around 0.818182</output>

<gadget id="calculator">55 * (9/11)</gadget>
<output>45</output>

<gadget id="calculator">55 + 45</gadget>
<output>100</output>

<gadget id="calculator">20 / (1/4_000_000) / 100_000 / 100</gadget>
<output>8</output>

<result>8</result>