186 trees were planted in the fifth grade of the Arbor Day, 12 fewer than twice the number of trees planted in the third grade. How many trees did the three-year students plant in total?
植树节五年段种树186棵，比三年级种的棵数的2倍少12棵．三年段的学生共种树多少棵？
<gadget id="calculator">186 + 12</gadget>
<output>198</output>

<gadget id="calculator">198 / 2</gadget>
<output>99</output>

<result>99</result>