farmer picked some peaches, and after a while someone bought some of them (2/9), so he quickly picked another 30 peaches. At this time, the number of peaches was equivalent to the number of peaches picked at the beginning (17/18). Ask: How many peaches are there at this time?
一个果农摘下了一些桃子，不一会儿就有人买走了其中的(2/9)，于是他又赶紧摘了30个，这时桃子数量相当于开始摘下的(17/18)，问：这时有多少个桃子？
<gadget id="calculator">17 / 18</gadget>
<output>17/18 = around 0.944444</output>

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

<gadget id="calculator">1 - (2/9)</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">(17/18) - (7/9)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">30 / (1/6)</gadget>
<output>180</output>

<gadget id="calculator">180 * (17/18)</gadget>
<output>170</output>

<result>170</result>