A batch of Xinfei air conditioners have been shipped to the home appliance store, and half of them have been sold, less than 4 units, leaving 38 Xinfei air conditioners. How many units were there in this batch of Xinfei air conditioners? (solution by equation)
家电商场运进一批新飞空调，已经卖出了一半少4台，还剩下38台新飞空调．这批新飞空调原来有多少台？(用方程解)
<gadget id="calculator">38 - 4</gadget>
<output>34</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">34 / (1/2)</gadget>
<output>68</output>

<result>68</result>