👉 The term "fourfold" is a mathematical concept that refers to the fact that in any number, there are two digits whose value is exactly three times that of the remaining two digits. For example, in the number 123456789, the digit '3' appears four times, which means its value is three times the value of each of the other digits (1 and 6). In this case, "fourfold" refers to the fact that there are
