The older brother and the younger brother bought "Fun Math", the older brother's money was 2.06 yuan less for a copy of "Fun Math", and the younger brother's money was 3.42 yuan less; "0.58 left. How much is a copy of "Fun Mathematics"?
哥哥与弟弟买《趣味数学》，哥哥的钱买一本《趣味数学》少2.06元，弟弟的钱买一本《趣味数学》差3.42元；哥哥与弟弟的钱合起来买一本《趣味数学》还剩0.58．问一本《趣味数学》多少钱？
<gadget id="calculator">2.06 + 3.42 + 0.58</gadget>
<output>6.06</output>

<gadget id="calculator">1 - 1</gadget>
<output>0</output>

<gadget id="calculator">1 + 0</gadget>
<output>1</output>

<gadget id="calculator">6.06 / 1</gadget>
<output>6.06</output>

<result>6.06</result>