The price of a poplar sapling is 60 yuan, the price of a pine sapling is (4/5) the price of a poplar sapling, the price of a willow sapling is (7/8) of a pine sapling, and the price of a pine sapling is (7/8). How much is the price of a willow sapling?
一棵杨树苗的价钱是60元，一棵松树苗的价钱是一棵杨树苗价钱的(4/5)，一棵柳树苗的价钱是一棵松树苗的(7/8)，一棵柳树苗的价钱是多少元？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">60 * (4/5) * (7/8)</gadget>
<output>42</output>

<result>42</result>