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The positive integer multiples of 7 which give results between 70 and 420 are:

10 x 7 = 70

11 x 7 = 77

12 x 7 = 84

13 x 7 = 91

14 x 7 = 98

15 x 7 = 105

16 x 7 = 112

17 x 7 = 119

18 x 7 = 126

19 x 7 = 133

20 x 7 = 140

21 x 7 = 147

22 x 7 = 154

23 x 7 = 161

24 x 7 = 168

25 x 7 = 175

26 x 7 = 182

27 x 7 = 189

28 x 7 = 196

29 x 7 = 203

30 x 7 = 210

31 x 7 = 217

32 x 7 = 224

33 x 7 = 231

34 x 7 = 238

35 x 7 = 245

36 x 7 = 252

37 x 7 = 259

38 x 7 = 266

39 x 7 = 273

40 x 7 = 280

41 x 7 = 287

42 x 7 = 294

43 x 7 = 301

44 x 7 = 308

45 x 7 = 315

46 x 7 = 322

47 x 7 = 329

48 x 7 = 336

49 x 7 = 343

50 x 7 = 350

51 x 7 = 357

52 x 7 = 364

53 x 7 = 371

54 x 7 = 378

55 x 7 = 385

56 x 7 = 392

57 x 7 = 399

58 x 7 = 406

59 x 7 = 413

60 x 7 = 420

The sum of all these products is 12495.

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Q: What is the sum of the multiples of 7 from 70 to 420?
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