210.2963
6587
56.78
1419.5
5678 is only one 4-digit number. If you're willing to move the digits around to different positions, you can make 23 more.
5678*1 = 5678
The answer is 369,070.
39,746
97.8966
4,536 x 5,678 = 25,755,408
72% of 5678 = 5678/100 x 72 = 4088.16
5678 + 69022 = 74700
42+5678 = 5720
5678 + 7467 = 13,145
5678 + 2987 = 8,665
sqrt(5678) = 75.35 approx.
7908 + 5678 = 13,586