There are 50 fruit trees in the orchard, of which peach trees account for 20%, and pear trees are 5% more than peach trees. How many pear trees are there?
果园里有果树50棵，其中桃树占20%，梨树比桃树多5%，梨树有多少棵？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">50 * (1/5) * (3/2)</gadget>
<output>15</output>

<result>15</result>