There are two three-digit numbers, and their sum is 999. If the larger number is placed to the left of the smaller number, and a decimal point is placed between the two numbers, the number formed is exactly equal to placing the smaller number on the larger number. 6 times the number formed by a decimal point in the left middle point of , then what is the difference (big reduction) between these two numbers.
有两个三位数，它们的和是999，如把较大数放在较小数的左边，点一个小数点在两数之间所成的数，正好等于把较小数放在较大数的左边中间点一个小数点所成的数的6倍，那么这两个数的差(大减小)为多少．
<gadget id="calculator">6 * 999</gadget>
<output>5_994</output>

<gadget id="calculator">999 / 1_000</gadget>
<output>999/1_000 = around 0.999</output>

<gadget id="calculator">5_994 - (999/1_000)</gadget>
<output>5_993_001/1_000 = around 5_993.001</output>

<gadget id="calculator">1 / 1_000</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">6 * (1/1_000)</gadget>
<output>3/500 = around 0.006</output>

<gadget id="calculator">6 - (1/1_000) - (3/500)</gadget>
<output>5_993/1_000 = around 5.993</output>

<gadget id="calculator">1 + (5_993/1_000)</gadget>
<output>6_993/1_000 = around 6.993</output>

<gadget id="calculator">(5_993_001/1_000) / (6_993/1_000)</gadget>
<output>857</output>

<gadget id="calculator">999 - 857</gadget>
<output>142</output>

<gadget id="calculator">857 - 142</gadget>
<output>715</output>

<result>715</result>