Precision deficiency

[oneMord]

0.48 * 2.38 / 5 * 10 = 1.95159999999

The correct answer should be 1.9516

[RobertZenz]

• Calculation bug #20
• Calculation problem #52
• Problem with simple sum accounts #55
• using angle function and pi #76
• BigDecimal version #84
• Precision on result  #96
• 0.3*3 != 0.9 #104

exp4j uses doubles, which are floating-point numbers which are by definition inaccurate.

If you need arbitrary precision you need to use something like EvalEx which uses BigDecimal.