When Lin Hai calculated 3.42 plus one decimal place, he mistakenly aligned the ends of the numbers, and the calculated result was 4.25. What should be the correct result?
林海在计算3.42加一个一位小数时，由于错误地把数的末尾对齐了，计算出的得数是4.25，正确的得数应该是多少．
<gadget id="calculator">4.25 - 3.42</gadget>
<output>0.83</output>

<gadget id="calculator">0.83 * 10</gadget>
<output>8.3</output>

<gadget id="calculator">3.42 + 8.3</gadget>
<output>11.72</output>

<result>11.72</result>