Master Lu plans to plant 120 fruit trees. After the total number of peach trees (1/6) is planted, there are still 10 fewer than pear trees. How many pear trees need to be planted?
陆师傅准备种120棵果树，桃树种了总棵数(1/6)后，还比梨树少10棵．需要种的梨树有多少棵？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">120 * (1/6)</gadget>
<output>20</output>

<gadget id="calculator">20 + 10</gadget>
<output>30</output>

<result>30</result>