已上线小程序，通过input输入修改数据库数据时每次输入2.28数据库后台会更新成2.27999999999999999997，不知什么原因？

<view class=“input_box”>

<label>请输入单独购买价格：</label>

<input type=‘text’ name=“mprice” placeholder="{{item.mprice/100}}" value="{{item.mprice/100}}" />

</view>

wx.showModal({   content: '是否更新产品？',   success: function(res) {     if (res.confirm) {       wx.cloud.callFunction({           name: 'updateproduct',           data: {             type: 'updateproducts',             data: {               id2: e.detail.target.dataset.id,               endTime2: e.detail.value.endTime,               gprice2: e.detail.value.gprice * 100,               groupSize2: e.detail.value.groupSize,               maxNum2: e.detail.value.maxNum,               mprice2: e.detail.value.mprice * 100,               unit2: e.detail.value.unit,               name2: e.detail.value.name,               sort2: Number(e.detail.value.sort),               serviceNote2: e.detail.value.servicenote,               cid2: Number(self.data.cid),               sale_flag: sale_flag             }           }         })         .then(res => {           wx.showToast({             title: '更新产品成功',             icon: 'success'           })

以下为云函数代码

return await goodsorderCollection.doc(id2)     .update({       data: {         endTime: endTime2,         gprice: gprice2,         groupSize: groupSize2,         maxNum: maxNum2,         mprice: mprice2,         unit: unit2,         name: name2,         sort: sort2,         serviceNote: serviceNote2,         cid: cid2,         sale_flag: sale_flag,       }     }) } catch (e) {   console.error(e) }