Xiaohua's house is 1800 meters away from grandma's house. In the morning, Xiaohua went from home to grandma’s house. She walked 60 meters per minute. When she walked 180 meters, she suddenly realized that she forgot to bring the cakes she had made to grandma. Speed to grandma's house. How many minutes did it take to reach grandma's house?
小花家离姥姥家有1800米远．早晨，小花从家去姥姥家，她每分钟走60米，走了180米时，她突然想到忘记把做好的饼带给姥姥了，她以同样的速度回家拿了饼再以同样的速度去姥姥家．到达姥姥家一共走了多少分钟？
<gadget id="calculator">180 * 2</gadget>
<output>360</output>

<gadget id="calculator">1_800 + 360</gadget>
<output>2_160</output>

<gadget id="calculator">2_160 / 60</gadget>
<output>36</output>

<result>36</result>