The school planted 120 trees this year, 15 more than last year (3/5). How many trees were planted last year? How many
学校今年植树120棵，比去年的(3/5)多15棵，去年植树多少棵？多少
<gadget id="calculator">120 - 15</gadget>
<output>105</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">105 / (3/5)</gadget>
<output>175</output>

<result>175</result>