class HumanReadableSize {

    public static String parse(final BigDecimal size) throws IllegalArgumentException {
        return parse(size.longValueExact());
    }

}

class HumanReadableSizeTest {

    @Test
    public void megabyteLargeSizeFailed() {

        assertEquals("68.44MB", HumanReadableSize.parse("71754584"));
    }

}