text: module.exports = function zeros(exp) {
      let part = exp.split("*");
      let two=0;
      let five=0;
  
      part.map(elem => {
        let period,
          num;
    
        if (elem[elem.length-1]=='!' && elem[elem.length-2]=='!') {
          period = 2;
          num = +elem.slice(0, -2);
        } else {
          period = 1;
          num = +elem.slice(0, -1);
        }
        for(; 0 < num ; num -= period) {
          let temp=num;
          while (temp % 5 == 0) { 
            temp /= 5;
            five++;
          }
        temp=num;
          while (temp % 2 == 0) {
            temp /= 2;
            two++;
          }
        }
      });
  
      return Math.min(two, five);
    }
  
  