div

/*
 *  call-seq:
 *     big / other     => Numeric
 *     big.div(other)  => Numeric
 *
 *  Divides big by other, returning the result.
 */

static VALUE
rb_big_div(x, y)
    VALUE x, y;
{
    VALUE z;

    switch (TYPE(y)) {
      case T_FIXNUM:
        y = rb_int2big(FIX2LONG(y));
        break;

      case T_BIGNUM:
        break;

      case T_FLOAT:
        return rb_float_new(rb_big2dbl(x) / RFLOAT(y)->value);

      default:
        return rb_num_coerce_bin(x, y);
    }
    bigdivmod(x, y, &z, 0);

    return bignorm(z);
}