Sun-dried bamboo shoots need to evaporate about 90% of the water. How many kilograms of bamboo shoots does Xiaoming's mother need to dry 180 kilograms of dried bamboo shoots?
笋晒成笋干，要蒸发掉大约90%的水分．小明妈妈晒180千克笋干，大约需要多少千克笋？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

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

<result>1_800</result>