What kind of numbers do you fill in the brackets to make the calculation simple? 0.25 * 4.8 + () * 4.8

There should be several
0.25*4.8+0.75*4.8=（0.25+0.75）*4.8=4.8
0.25*4.8+1.75*4.8=（0.25+1.75）*4.8=2*4.8=9.6
0.25*4.8+2.75*4.8=（0.25+2.75）*4.8=3*4.8=14.4
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