4×107

4×107 is a compact expression that can be interpreted in two common ways, depending on how it is read in plain text. If the intent is scientific notation, it is 4 × 10^7, which equals 40,000,000. In this reading, 4×10^7 denotes an order of magnitude typical of large counts in science and engineering, such as populations, counts of molecules, or memory capacities expressed in tens of millions.

If treated literally as 4 × 107, without an exponent marker, it evaluates to 428. This reading results from multiplying four by one hundred seven, a standard arithmetic result that can appear in basic math problems or small-scale calculations.

Ambiguity arises in plain text where superscripts are not available. To avoid confusion, the preferred notation in scientific contexts is 4 × 10^7 for forty million, or the explicit decimal 428 when multiplying 4 by 107. In programming and data contexts, scientific notation is common (for example, 4e7 is another way to represent forty million).