7*7 + 7 - 7 is one of many ways to do this.
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357 * 49 / 7 = 2499
49 metre because seven sevens = 49
42, 49, 56, 63, 70.....
Its easy 50=49+1 (7*7)=49 and (7/7)=1 50=(7*7)+(7/7)
There are seven sevens in fifty, as 50 divided by 7 equals approximately 7.14. This means that seven multiplied by 7 equals 49, which is the largest multiple of seven that fits into fifty. Thus, the whole number of sevens in fifty is seven.