3 см 7 мм × 4

To perform the multiplication, you should first convert the measurements into the same unit. You have "3 см 7 мм," which is equivalent to "37 мм," since 1 centimeter is equal to 10 millimeters.

Now that you have 37 мм (millimeters), you can multiply this by 4:

37 мм × 4 = 148 мм

The result is 148 мм (millimeters). If you want to convert it back to centimeters (and millimeters if necessary), you divide by 10 because 10 millimeters make up 1 centimeter.

148 мм ÷ 10 = 14 см 8 мм

So, the final answer is 14 см 8 мм (14 centimeters and 8 millimeters).