In the spring tree planting activities, the sixth grade of Hongqi Primary School planted 136 trees, which is 10 trees less than twice the number of trees planted in the fifth grade. How many trees were planted in the fifth grade?
在春季植树活动中，红旗小学六年级植树136棵，比五年级植树棵数的2倍少10棵，五年级植树多少棵？
<gadget id="calculator">136 + 10</gadget>
<output>146</output>

<gadget id="calculator">146 / 2</gadget>
<output>73</output>

<result>73</result>