Among the six numbers 25, 125, 4, 8, 32, and 68, choose 3 numbers, write the multiplication formula, and use the commutative law of multiplication and the associative law of multiplication to perform simple calculations.
在25、125、4、8、32、68这六个数中，任选3个数，写成乘法算式，并运用乘法交换律和乘法结合律进行简便运算．
<gadget id="calculator">32 * 25</gadget>
<output>800</output>

<gadget id="calculator">68 * 25</gadget>
<output>1_700</output>

<gadget id="calculator">800 + 1_700</gadget>
<output>2_500</output>

<result>2_500</result>