The Egyptian pyramid is now about 140 meters high, which is lower than when it was built (1/21). How many meters was it when it was built?
埃及金字塔现在高度大约140米，比建成时低了(1/21)，建成时大约高多少米？
<gadget id="calculator">1 / 21</gadget>
<output>1/21 = around 0.047619</output>

<gadget id="calculator">1 - (1/21)</gadget>
<output>20/21 = around 0.952381</output>

<gadget id="calculator">140 / (20/21)</gadget>
<output>147</output>

<result>147</result>