Guangming Primary School planted 60 trees in the third grade, twice as many trees in the fourth grade, and 15 fewer trees in the fifth grade than in the fourth grade. How many trees are planted in fifth grade?
光明小学三年级植树60棵，四年级植的棵数是三年级的2倍，五年级植的比四年级的棵数少15棵．五年级植树多少棵？
<gadget id="calculator">60 * 2</gadget>
<output>120</output>

<gadget id="calculator">120 - 15</gadget>
<output>105</output>

<result>105</result>