A toy store newly purchased 30 models of airplanes and cars. Among them, the airplane models each have 3 wheels, and the car models each have 4 wheels. These toy models have a total of 110 wheels. How many new aircraft models are there?
某玩具店新购进飞机和汽车模型共30个，其中飞机模型每个有3个轮子，汽车模型每个有4个轮子，这些玩具模型共有110个轮子．则新购进的飞机模型有多少个．
<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">110 / 1</gadget>
<output>110</output>

<gadget id="calculator">120 - 110</gadget>
<output>10</output>

<result>10</result>