For a decimal, multiply its fractional part by 6 times and add it to the integer part to get 7, and multiply its decimal part by 10 times and add it to the integer part to get 9. What is the number?
一个小数，将它的小数部分扩大6倍与整数部分相加得7，将它的小数部分扩大10倍与整数部分相加得9，这个数是多少．
<gadget id="calculator">9 - 7</gadget>
<output>2</output>

<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 6</gadget>
<output>3</output>

<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">4 + (1/2)</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>