Climb the mountain to exercise your body. The speed of going up the mountain is 60 meters per minute. After reaching the top of the mountain, immediately go down the mountain along the original road and return to the foot of the mountain. The speed is 90 m/min. In 30 minutes, how many meters is the distance from the foot of the mountain to the top of the mountain?
强强爬山锻炼身体，上山速度为60米/分，到山顶后，马上沿原路下山回到山脚．速度为90米/分．共用时30分钟，从山脚到山顶的路程是多少米？
<gadget id="calculator">1 / 60</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">1 / 90</gadget>
<output>1/90 = around 0.011111</output>

<gadget id="calculator">(1/60) + (1/90)</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">30 / (1/36)</gadget>
<output>1_080</output>

<result>1_080</result>