If you would like to transform 50 cm to feet, you can do this using the following steps:
1 inch = 2.54 centimeters
1 inch ... 2.54 cm
x inches = ? ... 50 cm
1 * 50 = 2.54 * x
50 = 2.54 * x
x = 50 / 2.54
x = 19.69 inches
1 foot = 12 inches
1 foot ... 12 inches
y feet = ? ... 19.69 inches
1 * 19.69 = 12 * y
19.69 = 12 * y
y = 19.69 / 12
y = 1.64 feet
The correct result would be 1.64 feet.