Xiaoming received a call from his grandmother from the station, and immediately set off to pick up his grandmother by bicycle. At the same time, his grandmother also set off from the station to Xiaoming's house. The two walked the same road, with a total length of about 1.8 kilometers. Grandma traveled every minute. 30 meters, Xiao Ming travels 150 meters per minute, if Xiao Ming’s speed remains the same, how long will it take Xiao Ming to bring grandma home?
小明接到奶奶从车站打来的电话，马上骑车出发去接奶奶，同时奶奶也从车站出发向小明家赶，两人走的是同一条路，全长约1.8千米，奶奶每分钟行30米，小明每分钟行150米，如果小明速度始终不变，小明大概用多少时间可把奶奶接到家？
<gadget id="calculator">1.8 * 1_000</gadget>
<output>1_800</output>

<gadget id="calculator">150 + 30</gadget>
<output>180</output>

<gadget id="calculator">1_800 / 180</gadget>
<output>10</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<result>20</result>