To beautify the campus of Donghu Elementary School, the worker’s uncle painted 180 square meters of walls in 3 hours, which accounted for (2/3) of the wall area to be painted. How many hours did the worker’s uncle finish painting?
东湖小学美化校园，工人叔叔用3小时粉刷墙壁180平方米，占所要粉刷墙壁面积的(2/3)，工人叔叔粉刷完还要多少小时？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2/3) / 3</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(1/3) / (2/9)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>