very easy
easy
normal
hard
random
100
13431
What is 121x111
100
408
What is 34x12
100
907092
What is 908x999
100
87571242
What is 9999x8758
100
425604
What is 35467x12
200
12321
What is 111x111
200
861
What is 123x7
200
807618
What is 6566x123
200
5334336
What is 98x54432
200
2661
What is 887x3
300
19900
What is 100x199
300
1530
What is 45x34
300
8967408
What is 9876x908
300
5967288
What is 67x89064
300
56
What is 7x8
400
1607562
What is 4554x353
400
1351779
What is 9867x137
400
36
What is 12x3
500
56
What is 8x7
500
6035850
What is 7890x765
500
26893904
What is 778x34568
500
9644679
What is 97421x99
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