There are 180 poplars and cypresses in total, of which 1 poplar is cypress (4/5), how many poplars are there?
杨树和柏树共180棵，其中杨树的棵树是柏树的(4/5)，杨树有多少棵？
<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">180 * (4/9)</gadget>
<output>80</output>

<result>80</result>