ABCD represents a four-digit number, EFG represents a three-digit number, and A, B, C, D, E, F, G represent different numbers from 1 to 9. Given that ABCD+EFG=1993, ask: What is the difference between the maximum value and the minimum value of the product ABCD*EFG?
ABCD表示一个四位数，EFG表示一个三位数，A，B，C，D，E，F，G代表1至9中的不同的数字．已知ABCD+EFG=1993，问：乘积ABCD*EFG的最大值与最小值相差多少？
<gadget id="calculator">1_234 * 759</gadget>
<output>936_606</output>

<gadget id="calculator">1_759 * 234</gadget>
<output>411_606</output>

<gadget id="calculator">936_606 - 411_606</gadget>
<output>525_000</output>

<result>525_000</result>