There are a bunch of screws and nuts. If one screw is equipped with 2 nuts, there will be 10 more nuts; if 1 screw is equipped with 3 nuts, there will be 6 nuts less. How many screws are there in total?
有一堆螺丝和螺母，若一个螺丝配2个螺母，则多10个螺母；若1个螺丝配3个螺母，则少6个螺母．共有多少个螺丝？
<gadget id="calculator">10 + 6</gadget>
<output>16</output>

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">16 / 1</gadget>
<output>16</output>

<result>16</result>