k = kilo = x 1,000
eg.
1 kilogram = 1,000 grams = 1x 1,000 grams
10 kilograms = 10,000 grams = 10x 1,000 grams
1k = 1000 = 1x 1000
10k= 10,000 = 10x 1000
100k = 100,000 = 100x1000
1kk = 1,000,000 = 1x1000x1000
10kk = 10,000,000 = 10x1000x1000
<,< math lesson for you all