@Test
public void getAccurateDivide() throws Exception {

    int a = 4, b = -7, n = 1;
    logger.info("getAccurateDivide {}/{}, n is: {} result is: {}", a, b, n, DataUtil.getAccurateDivide(a, b, n));
    a = 3;
    b = 7;
    n = 30;
    logger.info("getAccurateDivide {}/{}, n is: {} result is: {}", a, b, n, DataUtil.getAccurateDivide(a, b, n));
}