Alright, let's solve this math problem step by step. First, we have the number 710. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 40. So, we're going to take the number 710 and add it to itself 40 times.
Step 1: 0 + 710 = 710
Step 2: 710 + 710 = 1420
Step 3: 1420 + 710 = 2130
Step 4: 2130 + 710 = 2840
Step 5: 2840 + 710 = 3550
Step 6: 3550 + 710 = 4260
Step 7: 4260 + 710 = 4970
Step 8: 4970 + 710 = 5680
Step 9: 5680 + 710 = 6390
Step 10: 6390 + 710 = 7100
Step 11: 7100 + 710 = 7810
Step 12: 7810 + 710 = 8520
Step 13: 8520 + 710 = 9230
Step 14: 9230 + 710 = 9940
Step 15: 9940 + 710 = 10650
Step 16: 10650 + 710 = 11360
Step 17: 11360 + 710 = 12070
Step 18: 12070 + 710 = 12780
Step 19: 12780 + 710 = 13490
Step 20: 13490 + 710 = 14200
Step 21: 14200 + 710 = 14910
Step 22: 14910 + 710 = 15620
Step 23: 15620 + 710 = 16330
Step 24: 16330 + 710 = 17040
Step 25: 17040 + 710 = 17750
Step 26: 17750 + 710 = 18460
Step 27: 18460 + 710 = 19170
Step 28: 19170 + 710 = 19880
Step 29: 19880 + 710 = 20590
Step 30: 20590 + 710 = 21300
Step 31: 21300 + 710 = 22010
Step 32: 22010 + 710 = 22720
Step 33: 22720 + 710 = 23430
Step 34: 23430 + 710 = 24140
Step 35: 24140 + 710 = 24850
Step 36: 24850 + 710 = 25560
Step 37: 25560 + 710 = 26270
Step 38: 26270 + 710 = 26980
Step 39: 26980 + 710 = 27690
Step 40: 27690 + 710 = 28400

So, 710*40 = 28400