Naughty intends to connect two 1.96-meter-long ropes to make a skipping rope, but the joints are shared by 0.19 meters. How long is the connected rope?
淘气打算把两根长度都是1.96米的绳子接起来做一根跳绳，结果接口处共用去了0.19米，接好后的绳子有多长？
<gadget id="calculator">1.96 - 0.19</gadget>
<output>1.77</output>

<gadget id="calculator">1.96 + 1.77</gadget>
<output>3.73</output>

<result>3.73</result>