wooden stick is inserted into the bottom of the water, and it is 50 cm wet, and then the stick is turned upside down and inserted into the bottom of the water. At this time, the wet part is 20 cm longer than half of it. How many centimeters is the length of the stick?
把一根木棍插入水底，湿了50厘米，然后再将木棍倒转后插入水底，这时湿的部分比它的一半长20厘米，木棍长多少厘米．
<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">100 - 20</gadget>
<output>80</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">80 / (1/2)</gadget>
<output>160</output>

<result>160</result>